Spectrum and antibiotic resistance in community- and hospital-acquired urinary tract infections among adults: Experience from a large tertiary care center in a developing country

Abstract

Background:

It is important to note that the causative agents and patterns of antibiotic resistance vary between urinary tract infections (UTIs) acquired in the community and those acquired in a hospital setting. Therefore, the aim of this study was to compare the types of organisms and patterns of antibiotic resistance in adult patients with community-acquired urinary tract infections (CA-UTIs) and hospital-acquired urinary tract infections (HA-UTIs).

Methods:

Retrospectively, we collected urine samples from patients at An-Najah National University Hospital who experienced nonrecurring urinary tract infections (UTIs) between January 2019 and December 2020. The data were subsequently analyzed using IBM-SPSS^® 21.0 software to determine the distribution of microorganisms and evaluate the rates of antibiotic resistance.

Results:

A total of 798 nonrepetitive UTI patients were included in our study, in which more than half of the UTIs occurred in female patients (472; 59.1%), and most of the UTIs were of community origin (611; 76.6%). Both community-acquired urinary tract infections (CA-UTIs) and hospital-acquired urinary tract infections (HA-UTIs) were more common in female patients (45.6% and 13.5%, respectively). Escherichia coli was the most commonly isolated urinary pathogen in both the CA-UTIs and HA-UTIs. The five most common isolated urinary pathogens were E. coli, Klebsiella pneumoniae, Enterococcus faecalis, E. faecium, and Pseudomonas aeruginosa. Among the isolated bacteria, 28.2% were extended-spectrum beta-lactamase (ESBL)-producing bacteria, 4.1% were carbapenem-resistant Enterobacterales (CRE), and 6.5% were vancomycin-resistant Enterococci. The most commonly isolated urinary pathogens from HA-UTIs showed higher resistance rates against all the tested antibiotics except for E. faecium, which showed greater resistance to tetracycline (42.5%) and quinupristin/dalfopristin (17.5%) in CA-UTIs.

Conclusions:

There are similarities in the etiological profiles of CA-UTI and HA-UTI, but the resistance rates are high, and urine culture is essential for the correct treatment of individual cases, even in primary care.